Bangladesh Under 19s won by 9 wickets (DLS Method)
Steve Smith smashed an unbeaten 91 and Glenn Maxwell hit 70 on Friday before bad light stopped play, with Australia winning their final warm-up game against New Zealand.
They were handed victory by five wickets courtesy of the DLS method after amassing 248 for five off 44 overs in reply to second string New Zealand's 286 for nine from 50 overs.
It was another fine knock from Smith, who made 89 not out in the second game on his return to Australian colours this week from a year-long ban for his role in ball-tampering.
But David Warner, who was in imperious form in the Indian Premier League, flopped again in opening the innings, out for two to follow his duck and 39 in the series.
Maxwell looked in fine touch, smashing 70 off 48 balls to go with the quick-fire 52 he made on Wednesday.
For New Zealand, Will Young smashed his second consecutive century, getting on top of Australian attack led by Pat Cummins and Mitchell Starc.
The 26-year-old, who is not part of New Zealand's World Cup squad, followed up a breezy 130 on Wednesday by reaching another ton with a pull for six over mid-wicket. He was eventually dismissed for 111.
George Worker chipped in with a handy 59, while Cummins was the pick of the Aussie bowlers, taking 4-32 off eight overs.
Australia won the series 2-1, claiming a close opening game at Allan Border Field by one wicket while their trans-Tasman rivals bounced back to easily take the second by seven wickets.